By not designing everything around car drivers, it's possible to have such things as "15-minute cities" where the aim is to have amenities withing a 15 minute walk or cycle. That reduces traffic delays as there'll be more people choosing to walk/cycle, plus the car journeys will be much shorter. They also reduce traffic collisions ("accidents" is a loaded term and should not be used for RTCs as it implies no fault), so it's really a win-win.
